pcf_sector: Sector pair correlation function

In antiphon/Kdirectional: Analysis of anisotropy in point patterns using second order statistics

Sector pair correlation function

Description

[DEFUNC] This is the same as "sector pair correlation function" in Stoyan 1991. Direction defined with a unit vector. Estimated in a cone of angle theta and different radii.

Usage

pcf_sector(
  x,
  r,
  theta,
  unit,
  epsilon,
  h,
  stoyan = 0.15,
  correction = "translation",
  n_dir = 12
)

Arguments

x	pp, list with $x~coordinates $bbox~bounding box
r	Ranges
theta	Direction sector central angles, list of ncol(x$x)-components.
unit	Alternative to theta, a matrix of direction vectors.
epsilon	Direction sector width angles
h	width of epanechnicov kernel
stoyan	if h not given, use h=stoyan/sqrt(lambda)
correction	"none" or translation. Translation only for rectangle box.
n_dir	If unit missing, compute on a grid with resolution n_dir

Details

Otherwise same as default pcf in spatstat, but now with an angle.

antiphon/Kdirectional documentation built on Feb. 13, 2023, 6:26 a.m.